MOT cost .

Triumph

Rocket Iii

981 MOT tests analysed. sits above the UK fleet average — here's where Rocket Iiis pass, fail, and end up on the retest sheet.

That's 14.0 points above the UK fleet average across our 1,988 tracked models — a confident result.

Pass

89.7%

Pass-after-fix

4.5%

Fail

5.5%

Avg miles

20,987

Pass + Pass-after-fix + Fail = 100%

The picture

Rocket Iii: a strong MOT record by UK norms

Across 981 MOT tests, the Rocket Iii returns 89.7% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is tyre tread under the limit. Brake pads worn below 1.0 mm and a non-conforming number plate round out the top three. Average tested mileage sits at 20,987, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.

Top ten reasons for rejection.

  1. 01

    Tyre tread depth not in accordance with the requirements

    9 occurrences · 0.9% of tests

  2. 02

    Brake lining or pad worn below 1.0mm

    6 occurrences · 0.6% of tests

  3. 03

    Number plate does not conform to the specified requirements

    5 occurrences · 0.5% of tests

  4. 04

    Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning

    5 occurrences · 0.5% of tests

  5. 05

    Audible warning not working

    5 occurrences · 0.5% of tests

  6. 06

    A headlamp missing, inoperative or more than ½ not functioning in the case of LED

    4 occurrences · 0.4% of tests

  7. 07

    A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning

    4 occurrences · 0.4% of tests

  8. 08

    Rate of flashing not between 60 and 120 times per minute

    3 occurrences · 0.3% of tests

  9. 09

    A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps

    3 occurrences · 0.3% of tests

  10. 10

    Reflector missing or reflecting white to the rear

    3 occurrences · 0.3% of tests

Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.

Worst-case fix budget · top 4 failures

£163–£325

If every one of this Rocket Iii's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →

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Build your own retest budget.

Tools that pre-empt a retest.

Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.

Item 01 · Amazon UK

Digital tyre-tread depth gauge

Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.

Search Amazon UK

Item 02 · Amazon UK

Brake pad measurement gauge

Testers fail pads under 1.5mm. A wear gauge tells you if you've got two months left or two weeks.

Search Amazon UK

Item 03 · Amazon UK

MOT-spec replacement number plate

Faded or non-standard plates fail outright. Replacements take ten minutes online with V5C details.

Search Amazon UK

Buying or keeping a Rocket Iii?

Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.

If you own a Rocket Iii and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.